A Kree warrior who watched her homeworld die in a civil war and blames the woman who started it, which is not an unreasonable position.
Supremor Dar-Benn is a revolutionary Kree warrior and an Accuser of the Kree Empire, fighting to restore the Kree homeworld Hala after it was plunged into a devastating civil war by Carol Danvers’s killing of the Supreme Intelligence. Zawe Ashton plays her in The Marvels. The reader who sent this list called her the Kree Accuser who declared vengeance on Carol Danvers, and the film is on her side of the argument more than you might expect.
Having found a Quantum Band on MB-418, she tears apart jump points across space to extract resources from other planets, Tarnax IV, Aladna and Earth among them, ruins peace talks between the Kree and the Skrulls, and comes into conflict with Danvers, Monica Rambeau and Kamala Khan, who wears the other Band.
Minor spoiler
Before she can siphon energy from Earth’s Sun to reignite Pama, the Marvels intervene, but she takes the second Band from Kamala. Trying to harness both, she opens a multiversal wormhole out of spite, and its energy disintegrates her.
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The list had Darr-Benn. Wikipedia has Dar-Benn, one r, and that is what this entry uses.